PING Help

[rpfinneran]

Anybody know what "M" means?

Router#ping 10.0.0.1 si 1500 df

Type escape sequence to abort.

Sending 5, 1500-byte ICMP Echos to 10.0.0.1, timeout is 2 seconds:

Packet sent with the DF bit set

M.M.M

Success rate is 0 percent (0/5)

[rpfinneran]

Found the answer...

http://www.cisco.com/en/US/products/sw/iosswrel/ps1831/products_tech_note09186a00800a6057.shtml

It means the local device needs to fragment, but df bit set. You will only see this if the device originating the ping is the device that must fragment.